People arrive to hear Tesla Motors Inc CEO Elon Musk demonstrate Tesla's new battery swapping program in Hawthorne, California June 20, 2013. Tesla Motors Inc on Thursday unveiled a system to swap battery packs in its electric cars in about 90 seconds, a service Musk said will help overcome fears a

Tesla Motors Inc CEO Elon Musk talks about Tesla's new battery swapping program in Hawthorne, California June 20, 2013. Tesla Motors Inc on Thursday unveiled a system to swap battery packs in its electric cars in about 90 seconds, a service Musk said will help overcome fears about their driving rang

Tesla Motors Inc CEO Elon Musk demonstrates Tesla's new battery swapping program in Hawthorne, California June 20, 2013. Tesla Motors Inc on Thursday unveiled a system to swap battery packs in its electric cars in about 90 seconds, a service Musk said will help overcome fears about their driving ran